struct date
{
    int year;
    int month;
    int day;
};
main()
{
    struct date today,term;
    int yearday, year, day;
    printf("Enter year/month/day:");
    scanf("%d%d%d",&today.year,&today.month,&today.day);
    term.month = 12;
    term.day = 31;
    for(yearday=0,year=1990;year<today.year; year++)
    {
        term.year = year;
        yearday += days(term);
    }
    yearday += days(today);
    day = yearday%5;
    if(day>0&&day<4) printf("He was fishing at that day.\n");
    else printf("He was sleeping at that day.\n");
}
days(day)
    struct date day;
    {
        static int day_tab[2][13]={{0,31,28,31,30,31,30,31,31,30,31,30,31,},{0,31,29,31,30,31,30,31,31,30,31,31,30,31},};
        int i,lp;
        lp = day.year%4 == 0 && day.year%100!=0 || day.year%400==0;
        for(i=1; i<day.month; i++)
          day.day+=day_tab[lp][i];
        return(day.day);
    }